*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            background: #f7f5f2;
            color: #1e1e2a;
            line-height: 1.7;
            padding: 0;
            margin: 0;
            min-height: 100vh;
        }
        a {
            color: #d97706;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #b45309;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: 12px;
        }
        ul,
        ol {
            padding-left: 1.5rem;
            margin: 1rem 0;
        }
        li {
            margin-bottom: 0.4rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: #1e1e2a;
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        h1 {
            font-size: 2.4rem;
            margin-top: 0.5rem;
        }
        h2 {
            font-size: 1.8rem;
            border-bottom: 3px solid #f59e0b;
            padding-bottom: 0.4rem;
            display: inline-block;
        }
        h3 {
            font-size: 1.35rem;
            color: #2d2d44;
        }
        h4 {
            font-size: 1.1rem;
            color: #3d3d55;
        }
        p {
            margin: 0.9rem 0;
            color: #2a2a3a;
        }
        strong {
            color: #b45309;
            font-weight: 700;
        }
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 1.2rem;
        }
        .site-header {
            background: linear-gradient(135deg, #1e1e2a 0%, #2d2d44 100%);
            padding: 0.8rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
            border-bottom: 3px solid #f59e0b;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .my-logo {
            font-size: 1.9rem;
            font-weight: 900;
            color: #fbbf24;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 8px rgba(251, 191, 36, 0.2);
            transition: transform 0.2s ease;
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .my-logo:hover {
            transform: scale(1.02);
            color: #f59e0b;
            text-decoration: none;
        }
        .my-logo .logo-icon {
            font-size: 2rem;
        }
        .my-logo .logo-sub {
            font-size: 0.7rem;
            font-weight: 400;
            color: #a5b4fc;
            letter-spacing: 0.5px;
            display: block;
            margin-top: -4px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 1.2rem;
        }
        .main-nav {
            display: flex;
            gap: 0.2rem;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: #e2e8f0;
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            font-size: 0.88rem;
            font-weight: 500;
            transition: background 0.25s ease, color 0.25s ease;
            white-space: nowrap;
        }
        .main-nav a:hover {
            background: rgba(251, 191, 36, 0.18);
            color: #fbbf24;
            text-decoration: none;
        }
        .main-nav a.active {
            background: #f59e0b;
            color: #1e1e2a;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.7rem;
            color: #fbbf24;
            cursor: pointer;
            padding: 0.2rem 0.6rem;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .breadcrumb {
            background: #fff;
            padding: 0.6rem 0;
            border-bottom: 1px solid #e5e7eb;
            font-size: 0.85rem;
        }
        .breadcrumb ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 0.3rem 0.6rem;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li+li::before {
            content: "›";
            margin-right: 0.6rem;
            color: #9ca3af;
            font-weight: 700;
        }
        .breadcrumb a {
            color: #6b7280;
        }
        .breadcrumb a:hover {
            color: #d97706;
        }
        .breadcrumb .current {
            color: #1e1e2a;
            font-weight: 600;
        }
        .hero {
            background: linear-gradient(145deg, #1e1e2a 0%, #2d2d44 60%, #1a1a2e 100%);
            padding: 2.8rem 0 3.2rem;
            color: #f1f5f9;
            text-align: center;
            border-bottom: 4px solid #f59e0b;
        }
        .hero h1 {
            color: #fbbf24;
            font-size: 2.8rem;
            margin-bottom: 0.5rem;
        }
        .hero p {
            color: #cbd5e1;
            font-size: 1.15rem;
            max-width: 700px;
            margin: 0.6rem auto 1.2rem;
        }
        .hero .last-updated {
            display: inline-block;
            background: rgba(251, 191, 36, 0.15);
            padding: 0.3rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            color: #fcd34d;
            border: 1px solid rgba(251, 191, 36, 0.25);
        }
        .hero .last-updated i {
            margin-right: 0.4rem;
        }
        .search-section {
            background: #fff;
            padding: 1.4rem 0;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .search-form {
            display: flex;
            max-width: 580px;
            margin: 0 auto;
            border-radius: 50px;
            overflow: hidden;
            border: 2px solid #e5e7eb;
            transition: border-color 0.3s ease;
            background: #fff;
        }
        .search-form:focus-within {
            border-color: #f59e0b;
        }
        .search-form input[type="text"] {
            flex: 1;
            padding: 0.8rem 1.3rem;
            border: none;
            outline: none;
            font-size: 1rem;
            background: transparent;
            color: #1e1e2a;
        }
        .search-form input[type="text"]::placeholder {
            color: #9ca3af;
        }
        .search-form button {
            background: #f59e0b;
            border: none;
            padding: 0 1.6rem;
            color: #1e1e2a;
            font-size: 1.1rem;
            cursor: pointer;
            transition: background 0.25s ease;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .search-form button:hover {
            background: #d97706;
        }
        .main-content {
            padding: 2.2rem 0 3rem;
        }
        .featured-image-wrapper {
            margin: 1.8rem 0 2.2rem;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            background: #fff;
            padding: 0.6rem;
        }
        .featured-image-wrapper img {
            border-radius: 10px;
            width: 100%;
        }
        .featured-image-wrapper figcaption {
            padding: 0.8rem 0.4rem 0.2rem;
            font-size: 0.85rem;
            color: #6b7280;
            text-align: center;
            font-style: italic;
        }
        .toc {
            background: #fff;
            border-radius: 16px;
            padding: 1.6rem 2rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
            margin: 1.8rem 0 2.4rem;
            border-left: 5px solid #f59e0b;
        }
        .toc summary {
            font-size: 1.3rem;
            font-weight: 700;
            cursor: pointer;
            color: #1e1e2a;
            padding: 0.2rem 0;
        }
        .toc ol {
            margin: 0.8rem 0 0 0;
            padding-left: 1.2rem;
            columns: 2 260px;
            column-gap: 2rem;
        }
        .toc ol li {
            margin-bottom: 0.3rem;
            break-inside: avoid;
        }
        .toc ol li a {
            color: #4b5563;
            font-weight: 500;
        }
        .toc ol li a:hover {
            color: #d97706;
            text-decoration: none;
        }
        .content-block {
            background: #fff;
            border-radius: 16px;
            padding: 1.8rem 2rem;
            margin: 1.8rem 0;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            transition: box-shadow 0.3s ease;
        }
        .content-block:hover {
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.07);
        }
        .content-block .emoji-lead {
            font-size: 1.5rem;
            margin-right: 0.4rem;
        }
        .highlight-box {
            background: #fef9ec;
            border-left: 5px solid #f59e0b;
            padding: 1.2rem 1.6rem;
            border-radius: 0 12px 12px 0;
            margin: 1.2rem 0;
        }
        .highlight-box strong {
            color: #b45309;
        }
        .level-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 0.8rem;
            margin: 1.2rem 0;
        }
        .level-grid .level-item {
            background: #f7f5f2;
            padding: 0.6rem 1rem;
            border-radius: 30px;
            text-align: center;
            font-weight: 600;
            font-size: 0.9rem;
            color: #1e1e2a;
            border: 1px solid #e5e7eb;
            transition: background 0.2s, transform 0.15s;
        }
        .level-grid .level-item:hover {
            background: #f59e0b;
            color: #1e1e2a;
            transform: translateY(-2px);
            border-color: #f59e0b;
        }
        .interaction-area {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.8rem;
            margin: 2.4rem 0;
        }
        @media (max-width:700px) {
            .interaction-area {
                grid-template-columns: 1fr;
            }
        }
        .comment-box,
        .rating-box {
            background: #fff;
            border-radius: 16px;
            padding: 1.6rem 1.8rem;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
            border: 1px solid #f0f0f5;
        }
        .comment-box h3,
        .rating-box h3 {
            margin-top: 0;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .comment-box form,
        .rating-box form {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
            margin-top: 0.6rem;
        }
        .comment-box textarea,
        .comment-box input,
        .rating-box select,
        .rating-box input {
            padding: 0.7rem 1rem;
            border-radius: 10px;
            border: 1.5px solid #e5e7eb;
            font-size: 0.95rem;
            font-family: inherit;
            transition: border-color 0.25s ease;
            background: #fafafa;
        }
        .comment-box textarea:focus,
        .comment-box input:focus,
        .rating-box select:focus,
        .rating-box input:focus {
            border-color: #f59e0b;
            outline: none;
            background: #fff;
        }
        .comment-box textarea {
            min-height: 90px;
            resize: vertical;
        }
        .btn-submit {
            background: #f59e0b;
            color: #1e1e2a;
            border: none;
            padding: 0.7rem 1.6rem;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.95rem;
            cursor: pointer;
            transition: background 0.25s ease, transform 0.15s;
            align-self: flex-start;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-submit:hover {
            background: #d97706;
            transform: scale(1.02);
        }
        friend-link {
            display: block;
            background: #1e1e2a;
            color: #e2e8f0;
            padding: 1.8rem 0;
            margin-top: 2.5rem;
            border-top: 4px solid #f59e0b;
        }
        friend-link .container {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem 2rem;
            justify-content: center;
        }
        friend-link a {
            color: #fbbf24;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s;
        }
        friend-link a:hover {
            color: #f59e0b;
            text-decoration: underline;
        }
        friend-link .friend-label {
            width: 100%;
            text-align: center;
            font-size: 0.85rem;
            color: #9ca3af;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 0.4rem;
        }
        .site-footer {
            background: #12121c;
            color: #a5b4fc;
            padding: 1.6rem 0;
            text-align: center;
            font-size: 0.9rem;
        }
        .site-footer .copyright {
            color: #6b7280;
            font-size: 0.82rem;
            margin-top: 0.4rem;
        }
        .site-footer a {
            color: #fbbf24;
        }
        @media (max-width: 820px) {
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: #1e1e2a;
                padding: 1rem 0.5rem;
                border-radius: 0 0 16px 16px;
                gap: 0.2rem;
                margin-top: 0.4rem;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 0.6rem 1.2rem;
                border-radius: 8px;
            }
            .hamburger {
                display: block;
            }
            .header-inner {
                align-items: center;
            }
            .nav-wrapper {
                width: 100%;
                justify-content: space-between;
            }
            .toc ol {
                columns: 1;
            }
            .content-block {
                padding: 1.2rem 1.2rem;
            }
            .my-logo {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding: 0 0.9rem;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .search-form input[type="text"] {
                padding: 0.6rem 1rem;
                font-size: 0.9rem;
            }
            .search-form button {
                padding: 0 1rem;
                font-size: 0.9rem;
            }
            .level-grid {
                grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
            }
        }
        .fade-in {
            animation: fadeUp 0.5s ease forwards;
        }
        @keyframes fadeUp {
            0% {
                opacity: 0;
                transform: translateY(16px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }